$('.title').mouseenter(function (){
    var index = $(this).index();
    $(this).find('nav-list').stop(true).slideDown(300);
    $('.line span').stop(true).animate({left: (90+30)*index},300);
})
$('.title').mouseleave(function (){
    $(this).find('nav-list').stop(true).slideUp(300);
})
$('.nav').mouseleave(function (){
    $('.line span').stop(true).animate({left: 0},300);
})